AVFoundation

播放音效

#import "VJAudioTool.h"
#import 
@implementation VJAudioTool
static NSMutableDictionary *soundIDDictionry;
+(void)load{
    
    soundIDDictionry = [NSMutableDictionary dictionary];
}
+(void)playWithSoundName:(NSString*)name
{
    SystemSoundID ID = [soundIDDictionry[name] intValue];
    if (!ID) {
        CFURLRef urlRef = (__bridge_retained CFURLRef)[[NSBundle mainBundle] URLForResource:name withExtension:nil];
        AudioServicesCreateSystemSoundID(urlRef, &ID);
        [soundIDDictionry setObject:@(ID) forKey:name];
        NSLog(@"create id");
    }
    
    AudioServicesPlayAlertSoundWithCompletion(ID, ^{
        NSLog(@"ok");
    });
}
@end

录音

#import "ViewController.h"
#import 
@interface ViewController ()
/* 录音**/
@property (nonatomic,strong) AVAudioRecorder *recorder;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    AVAudioSession * audioSession = [AVAudioSession sharedInstance];
    NSError *error ;
//    关闭后台其他程序的声音
    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: &error];
//    设置当前音效为活跃状态
    [audioSession setActive:YES error: &error];
    
}


- (IBAction)start:(id)sender {
//    结束录音
    [self.recorder stop];
}
- (IBAction)stop:(id)sender {
//    开启录音
    [self.recorder record];
}

- (AVAudioRecorder *)recorder{
    if (!_recorder) {
       NSString *path = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES).lastObject;
        NSString *voicePath = [path stringByAppendingPathComponent:@"aa.caf"];
        NSURL *voiceUrl =[NSURL fileURLWithPath:voicePath];
        NSDictionary *recordSetting = @{
                                        AVEncoderAudioQualityKey : @(AVAudioQualityHigh),
                                        AVEncoderBitRateKey:@(16),
                                        AVSampleRateKey:@(8000),
                                        AVNumberOfChannelsKey:@2
                                        };
        _recorder = [[AVAudioRecorder alloc] initWithURL:voiceUrl settings:recordSetting error:nil];
    }

    return _recorder;
}
@end

异常断点调试

• 在断点栏添加异常断点 默认为全部异常拦截 改为obectivec拦截即可
• 会在代码抛异常的地方进行拦截。

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